Hi there Jeanette!
Looks like you're already trying to make some healthy changes! Excellent work
Definitely continue to exercise regularly. That doesn't mean every day, for some of us it means every other day or just a few days a week.
The other part of losing weight is watching what we eat. This means keeping track of everything we put in our mouths. There are many options about how to do this. Some people prefer to watch their carbs and hunger levels, others count straight-up calories, some people order meals, or follow different programs. Have a look through Diet Central. You might find something that appeals to your lifestyle!
The healthiest places to shop in a regular grocery store are the outside edges. Produce, Dairy & Meat, Frozen (for veggies!). Sometimes whole grain or "organic" areas. Most of the "crap" is contained in the center aisles.
You like Mountain Dew, eh? Is there a Diet version that you like, too? Or how about continuing to drink it but just drinking less? Like only a can a day. Or perhaps you'll find down that road that you need to cut it out completely. It'll be individual.
Whatever you choose. Have a look around, post where you're comfortable!
Best of success!!!